diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2012-04-20 12:33:30 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2012-04-26 12:21:17 +0200 |
| commit | 9d55d1adc848a3dc1d2431c4ec4e7e4ea37fa0ee (patch) | |
| tree | 4552a8c6548d345bfca57364072329f073af3fc4 /hw/usb/dev-audio.c | |
| parent | b15cf49b78edb74dc783a7cacbc8391cbc728edc (diff) | |
usb: add serial number generator
This patch adds a function which creates unique serial numbers for usb
devices and puts it into use. Windows guests tend to become unhappy if
they find two identical usb devices in the system. Effects range from
non-functional devices (with yellow exclamation mark in device manager)
to BSODs. Handing out unique serial numbers to devices fixes this.
With this patch applied almost all emulated devices get a generated,
unique serial number. There are two exceptions:
* usb-storage devices will prefer a user-specified serial number
and will only get a generated number in case the serial property
is unset.
* usb-hid devices keep the fixed serial number "42" as it is used
to signal "remote wakeup actually works".
See commit 7b074a22dab4bdda9864b933f1bc811a3db42845
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/usb/dev-audio.c')
| -rw-r--r-- | hw/usb/dev-audio.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/usb/dev-audio.c b/hw/usb/dev-audio.c index 426b95c82b..79b75fb628 100644 --- a/hw/usb/dev-audio.c +++ b/hw/usb/dev-audio.c @@ -648,6 +648,7 @@ static int usb_audio_initfn(USBDevice *dev) { USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev); + usb_desc_create_serial(dev); usb_desc_init(dev); s->dev.opaque = s; AUD_register_card("usb-audio", &s->card); |